Protected Savegames
Protected savegames are encrypted with the "unique" random serial number that is given to a memory card each time it is formatted. Due to this fact the savegame will only work on the original memory card it was backuped from if that card hasn't been formatted.
To be confirmed if some protected savegames also rely on the block number the savefile starts (or how many blocks where occupied before the savegame was created).
Restoring a raw image to a different card has still to be tested to see if that will permit using a protected gamesave on another memory card.
Known protected savegames: Medal of Honor: Frontline, F-Zero GX, Pokemon Coloseum, Fire Emblem.
When restoring a savegame with GCMM, its permissions will be set to xxP (move, copy, public), meaning the file can be moved or copied by the WII/GC native memory card utility. Being able to move or copy the file doesn't mean it will work for the reasons explained above.